Scanner should show dpf in and out readings. If you intend to keep the car I would look at new dpf, especially if the last regen was 500 miles ago.

Possible not charging from alternator.

Is it manual, if so could it be clutch slipping?

Might be a silly question but did you roll them forward. Makes it quite flat.

Only with foot on brake, is it a miss fire or drop in rev as it may try and creep forward but can't as the brake is on so the revs fluctuate? Not an auto driver so only a question.

The misses ignored me one night, kept on telling me how she is ignoring me. Can't get any quiet time

I found a steam leak by looking when it's dark and using a torch. The vapour will show up more.

Common issue, I think it needs an open end spanner behind the tensioner. I've seen threads on it so keep searching.

How does it feel with engine off?

As you cured it for a few hundred miles maybe the pads are just not working well with the discs.

I've heard soft gentle braking can cause a squeel. A few hard stops now and then may help.

Whooshing would probably be pressured side of the turbo. Only takes a small hole. There is a weak point somewhere that I've seen mentioned on here, a elbow joint that might even be plastic

I'm sure they need to be damaging to crops to do that.

Possibly not, but your original stated loss from imobaliser module would. Did the code return after clearing?

Can we ignore for a few years for it to be resurrected with "I have the same problem" or "what was the solution"